2003 Smokes when hard acceleration

[dlm007]

I have a 2003 t-bird and have noticed that when I accelerate hard, light blue smoke comes out of my exhaust. I also noticed that when I start the car after sitting for a couple days, a puff of blue smoke comes out when I start the car. I took it into the dealer and they said there was bulletin on the valve cover gaskets leaking. They installed the fix and it still smokes occasionally on startup and smokes a lot when I accelerate hard.

I would think this is a problem with myexhasut value guide leaking?

Thought??